Join Date: Jun 2001
Location: Firestone, CO, USA
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Is my dynamic iris broken?
Quick question for other PT-AE8000U owners regarding the dynamic iris. I've had my AE8000 for a couple of months now. I typically run with the dynamic iris on. I watched Lord of the Rings early on, and could definitely notice the impact of the dynamic iris. At the beginning of the movie where the screen is completely black and we only hear the narrators voice, the image gradually got very dark...and then when the title "Lord of the Rings" comes up, it suddenly popped very bright. My thought at the time was that it was a bit aggressive, but at least the dynamic iris was working. I didn't notice the dynamic iris doing it's work anywhere else in the movie, so I wasn't too concerned. Also noticed when I paused a movie and the screen saver popped up with just a small blue "Samsung" logo on a black background, it gradually got very dark. Again, pretty clear indication that the dynamic iris was opening and closing.
Thing is, I noticed last night that the screen no longer appears to dim when the screen saver pops up. I also popped in Lord of the Rings, and on that opening scene, the black levels are very constant throughout. I did not see the dimming and sudden brightening of the image that I noticed when the projector was new. I have verified that the dynamic iris is enabled in settings.
If I pause the image and toggle the dynamic iris on and off, I do see a change in the image. In a dark scene, the light parts of the image actually get brighter...but the blacks don't seem to get any darker. I know that the gamma is dynamically adjusted as the iris opens and closes, and I suspect that what I may be seeing is the gamma being adjusted, but the dynamic iris remaining open. Not sure exactly how to go about verifying whether or not the dynamic iris is actually working.
Oh, one other thing worth mentioning. A couple months back, there were two occasions where the image got very dark when the screen saver came on and didn't get bright again when the movie started again. Power cycling the projector resolved this issue. This happened exactly twice within a week or so...and I haven't seen it since. Now I'm wondering if that might have been the DI failing. Just not sure if there's an issue or I'm imagining things.
Can any other AE8000 owners comment on whether or not they can detect the DI doing it's work when moving between very dark and very light scenes. Would be great if anyone has the LOTR extended addition and can watch that opening scene with the DI on and just comment on what you see.
Last edited by byancey; 06-28-2014 at 02:54 PM.
Reason: Adding title